CN102914758A

CN102914758A - Electronic type transformer verifying unit based on IEEE1588 clock calibration mode

Info

Publication number: CN102914758A
Application number: CN2012104159164A
Authority: CN
Inventors: 邵汉桥; 吴伯华; 吴涛; 张籍; 胡浩亮; 谢东; 王法靖; 章述汉; 李前
Original assignee: WUHAN CENTRAL CHINA POWER GRID CO Ltd; State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Current assignee: WUHAN CENTRAL CHINA POWER GRID CO Ltd; State Grid Corp of China SGCC; China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2012-10-26
Filing date: 2012-10-26
Publication date: 2013-02-06
Also published as: WO2014063564A1

Abstract

The invention discloses an electronic type transformer verifying unit based on an IEEE1588 clock calibration mode and relates to calibration and detection of electric equipment. The device consists of an IEEE1588 Ethernet switch (1), an IEEE1588 clock (2), a standard voltage/current converter (3), a standard channel data acquisition unit (4), a synchronous pulse transmitting module (5), a detected channel data acquisition unit (6), a data processing unit (7) and a GPS (global positioning system) (8). The IEEE1588 clock (2) of the device not only can be used as a master clock, but also can be used as a slave clock in a calibration measurement and can also support two time calibration modes including ETE (end to end) and PTP (peer to peer); and the device is small in size and capable of meeting the on-site verifying demands.

Description

A kind of based on IEEE1588 to the time mode electronic transformer calibrator

Technical field

The present invention relates to calibration and the detection of power equipment, more specifically relate to based on IEEE1588 to the time mode electronic transformer calibrator.

Background technology

Electronic mutual inductor is widely used in electric system at present, and its serviceability must determine that checking electronic type transformers equipment also has much by verification.Be that " electronic type general mutual inductor check meter " of CN201020187805.9 proposed a kind of calibration equipment of not only can the analog electronic mutual inductor of verification but also can check digit formula electronic mutual inductor such as the patent No., this tester can only carry out calibration test to the electronic mutual inductor of GPS and the B code method of synchronization, just can't calibrate the electronic mutual inductor of the IEEE1588 method of synchronization.

The patent No. be CN201010166052.8's " electronic type transformer checking system " point out: to the electronic type transformer checking system of based on data capture card, because capture card exists temperature to float and stability problem, and can't trace to the source, can not guarantee enough precision with its verification electronic mutual inductor.Although this patent adopts the method for criterion numeral table to solve the problem of precision, because the criterion numeral table is bulky, working environment is had relatively high expectations, and is not suitable for on-the-spot the use.

The patent No. be CN200920246771.3's " a kind of current transformer calibrator based on IEC 61850 standards " proposed a kind of can support three kinds synchronously to the time mode current transformer calibrator, but this tester is monitored the clock synchronization of ad message whether the IEEE1588 prescribed by standard is arranged on the network by network controller when work, after receiving sync message, further realize again IEEE1588 synchronously to the time, explanation is that this tester is at the scene during verification, need transformer station that major clock is arranged, tester can only be as from clock status.There are following two problems in this: 1) because transformer station's major clock generally can be placed on the pulpit, and electronic transducer calibration instrument generally is placed on the high pressure scene, and both can reach hundreds of rice at distance.It is very inconvenient to electronic transducer calibration instrument to draw an optical fiber from major clock.2) electronic mutual inductor error checking is generally carried out in whole converting station debugging process, this moment major clock may not yet debug, can't provide IEEE1588 to the time signal.Therefore, the on-the-spot use of this patent has limitation.

Summary of the invention

The purpose that the present invention solves is: a kind of electronic transformer calibrator based on the IEEE1588 method of synchronization is provided, this device has been equipped with IEEE1588 clock and IEEE1588 Ethernet switch, can carry out calibration test to the electronic current of the employing IEEE1588 method of synchronization and the accuracy of electronic type voltage transformer, the IEEE1588 clock of this device is when calibration measurement, both can be used as major clock, also can be used as from clock, and can support two kinds of ETE and PTP to the time mode; This device volume is little, satisfies the field-checking demand.

A kind of based on IEEE1588 to the time mode electronic transformer calibrator, this device is comprised of IEEE1588 Ethernet switch, IEEE1588 clock, normal voltage current converter, standard channel data acquisition unit, synchronizing pulse sending module, tested channel data collecting unit, data processing unit and GPS.IEEE1588 Ethernet switch output terminal respectively with the IEEE1588 clock be connected channel data collecting unit input end and be connected, another input end of IEEE1588 clock is connected with the output terminal of GPS, the IEEE1588 output terminal of clock is connected with synchronizing pulse sending module input end, synchronizing pulse sending module output terminal is connected with standard channel data acquisition unit input end with normalized current electric pressure converter output terminal and is connected, standard channel data acquisition unit output terminal be connected channel data collecting unit output terminal and all be connected with data processing unit.

The standard channel data acquisition unit adopts high-accuracy data collection card PCI5922, this capture card is equipped with voltage standard and the temperature sensor of high stable pin-point accuracy, when exterior temperature change surpasses 5 degrees centigrade, PCI5922 can carry out self calibration, the direct current biasing of correction A/D Acquisition Circuit and non-linear.Guarantee that electronic transformer calibrator keeps pin-point accuracy under the temperature variation condition of wide region out of doors.

Advantage compared with prior art of the present invention is:

(1) the high-accuracy data collection card PCI5922 that adopts American National Instr Ltd. to produce, in voltage reference is arranged, have self-calibration function, can eliminate the error of being brought by temperature variation; And the capture card system bulk is small and exquisite, is fit to on-the-spot the use.

(2) be equipped with the IEEE1588 clock, both can be used as major clock, also can be used as from clock; Clock zone pulse per second (PPS) output function, when synchronous when successful (clocking error is no more than 1us) pulse per second (PPS) just can export.

(3) be equipped with the IEEE1588 switch, when tested merge cells IEEE1588 Frame and the shared network interface of IEC61850 Frame, can have expanded it, the one tunnel is used as synchronously, and one the tunnel is used as the IEC61850 data sampling.

(4) be equipped with the IEEE1588 switch, can support two kinds of ETE and PTP to the time mode.Can investigate different on the time mode on the impact of electronic mutual inductor error.

Description of drawings

Fig. 1 be a kind of based on IEEE1588 to the time mode the structural representation of electronic transformer calibrator.

Wherein: 1 is that IEEE1588 Ethernet switch, 2 is the IEEE1588 clock, and 3 is the normal voltage current converter, and 4 is the standard channel data acquisition unit, 5 is the synchronizing pulse sending module, 6 is tested channel data collecting unit, and 7 is data processing unit, and 8 is GPS.

Working state schematic representation when Fig. 2 is check digit output type electronic current mutual inductor of the present invention.

Wherein: 9 be a kind of based on IEEE1588 to the time mode electronic transformer calibrator, 10 is pressure regulator, 11 is current lifting device, 12 is digital output type electronic current mutual inductor, 13 is the secondary converter, 14 is merge cells, 15 is standard current transformer.

Embodiment

The present invention is further illustrated below in conjunction with accompanying drawing.

A kind of based on IEEE1588 to the time mode electronic transformer calibrator, as shown in Figure 1, this device is comprised of IEEE1588 Ethernet switch 1, IEEE1588 clock 2, normal voltage current converter 3, standard channel data acquisition unit 4, synchronizing pulse sending module 5, tested channel data collecting unit 6, data processing unit 7 and GPS 8.IEEE1588 Ethernet switch 1 output terminal respectively with IEEE1588 clock 2 be connected channel data collecting unit 6 input ends and be connected, another input end of IEEE1588 clock 2 is connected with the output terminal of GPS 8, IEEE1588 clock 2 output terminals are connected with synchronizing pulse sending module 5 input ends, synchronizing pulse sending module 5 output terminals are connected output terminal and are connected with standard channel data acquisition unit 4 input ends respectively with the normalized current electric pressure converter, standard channel data acquisition unit 4 output terminals be connected channel data collecting unit 6 output terminals and all be connected with data processing unit 7.

Workflow and principle with check digit output type electronic current mutual inductor of the present invention:

During with check digit output type electronic current mutual inductor of the present invention, first the present invention and digital output type electronic current mutual inductor are connected by Fig. 2 mode, as shown in Figure 2, be that tested primary current signal is provided by pressure regulator 10 and current lifting device 11, digital output type electronic current mutual inductor 12 and standard current transformer 15 are connected by the primary circuit.The digital signal output end of numeral output type electronic current mutual inductor 12 is connected with the receiving end of secondary converter 13, the output terminal of secondary converter 13 is connected with merge cells 14 data acquisition ports, merge cells 14 data acquisition ports are connected with IEEE1588 Ethernet switch 1 input end in the electronic type transformer checking system 9, and standard current transformer 15 secondary output terminals are connected with normal voltage current transformer 3 in the electronic type transformer checking system 9.

With the present invention with after digital output type electronic current mutual inductor is connected in a manner described, arrange again to the time working method and mode of operation.Method to set up has following 4 kinds:

A, to the time working method be: merge cells 14 is as major clock, and IEEE1588 clock 2 is as from clock; Mode of operation: merge cells 14 be ETE to the time mode, the IEEE1588 clock setting is the ETE pattern; Realize that merge cells 14 is to the measurement of the whole path delay of IEEE1588 clock.

B, to the time working method be: merge cells 14 is as from clock, and IEEE1588 clock 2 is as major clock; Mode of operation: merge cells 14 be ETE to the time mode, the IEEE1588 clock setting is the ETE pattern; Realize that merge cells 14 is to the measurement of the whole path delay of IEEE1588 clock.

C, to the time working method be: merge cells 14 is as major clock, and IEEE1588 clock 2 is as from clock; Mode of operation: merge cells 14 be PTP to the time mode, the IEEE1588 clock setting is ptp mode; Realize that merge cells 14 is to the time-delay between the IEEE1588 Ethernet switch 1 and IEEE1588 Ethernet switch 1 to the Time delay measurement between the IEEE1588 clock.

C, to the time working method be: merge cells 14 is as from clock, and IEEE1588 clock 2 is as major clock; Mode of operation: merge cells 14 be PTP to the time mode, the IEEE1588 clock setting is ptp mode; Realize that merge cells 14 arrives the measurement of the time-delay time-delay between the IEEE1588 clock to the time-delay between the IEEE1588 Ethernet switch 1 and IEEE1588 Ethernet switch 1.

To the time after working method and mode of operation set, according to following workflow check digit output type electronic current mutual inductor 12:

Electric current is provided for digital output type electronic current mutual inductor 12 and standard current transformer 15 by pressure regulator 10 and current lifting device 11, the tested current digital signal that numeral output type electronic current mutual inductor 12 will collect passes to secondary converter 13, signal after secondary converter 13 will be nursed one's health sends to merge cells 14, merge cells 14 converts signal to and meets the IEC61850 agreement and send to electronic type transformer checking system 9, and between merge cells 14 and the electronic type transformer checking system by sending out mutually 1588 protocol massages, realize to the time.When merge cells 14 during as major clock, with time of merge cells 14 as the standard time; When IEEE1588 clock 2 during as major clock, with IEEE1588 clock 2 from time that GPS 8 receives as the standard time; Error between master-salve clock is less than 1us, the time, to the time success, to the time success after the 2 output pulse per second (PPS)s of IEEE1588 clock; Trigger criteria channel data collecting unit 4 was sampled after synchronizing pulse sending module 5 received synchronizing pulse, standard channel data acquisition unit 4 is sampled the signal of standard converter 3 outputs, and sends the data to data process errors calculating display unit 7; Be sent to the data process errors after the sampling message that simultaneously tested passage numeral input data acquisition unit 6 sends merge cells is resolved and calculate display unit 7; The data process errors is calculated display unit 7 calculates tested electronic mutual inductor by the phase difference correction fft algorithm angular difference and ratio.After changing standard signal, standard current transformer 15 sends to the normal voltage current transformer in the electronic type transformer checking system 9.The tested electric current of electronic type transformer checking system 9 measurements and calculations and standard signal are finished the electronic current mutual inductor verification, draw by the error of school electronic mutual inductor.

Claims

One kind based on IEEE1588 to the time mode electronic transformer calibrator, it is characterized in that this device is comprised of IEEE1588 Ethernet switch (1), IEEE1588 clock (2), normal voltage current converter (3), standard channel data acquisition unit (4), synchronizing pulse sending module (5), tested channel data collecting unit (6), data processing unit (7) and GPS (8); IEEE1588 Ethernet switch (1) output terminal respectively with IEEE1588 clock (2) be connected channel data collecting unit (6) input end and be connected, another input end and GPS(8 of IEEE1588 clock (2)) output terminal be connected, IEEE1588 clock (2) output terminal is connected with synchronizing pulse sending module (5) input end, synchronizing pulse sending module (5) output terminal is connected 3 with the normalized current electric pressure converter) output terminal is connected with standard channel data acquisition unit (4) input end respectively, standard channel data acquisition unit (4) output terminal be connected channel data collecting unit (6) output terminal and all be connected with data processing unit (7).
According to claim 1 a kind of based on IEEE1588 to the time mode electronic transformer calibrator, it is characterized in that described standard channel data acquisition unit adopts high-accuracy data collection card PCI5922.